Ответ:
1) (20-22,05:2,1)•6,4+9,2= (20-10,5)•6,4+9,2=9,5•6,4+9,2=60,8+9,2=70
2) 7x+2x=3,528
9x=3528
x=3528:9
x= 392
6,4•(y-12,8)=3,2
y-12,8=0,5
y=0,5+12,8
y=13,3
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Answers & Comments
Ответ:
1) (20-22,05:2,1)•6,4+9,2= (20-10,5)•6,4+9,2=9,5•6,4+9,2=60,8+9,2=70
2) 7x+2x=3,528
9x=3528
x=3528:9
x= 392
6,4•(y-12,8)=3,2
y-12,8=0,5
y=0,5+12,8
y=13,3